News Flash - Do you collect tubes or semiconductors?

[JohnK]

Many of your tubes probably should be in your semiconductor collection.

And, if semiconductor is a dirty word, then in the bin !

Reference:-   Kohl, Materials and Techniques for Electron Tubes A completely revised edition of Materials Technology for Electron Tubes., 1960, Reinhold.

Page 551 describes Barium-Strontium-Calcium Oxide Cathodes, as "most widely used at the present time in receiving tubes, cathode ray tubes, picture tubes, and similar devices".

Wait for it.... "Oxide cathodes are n-type semiconductors....".

 

sorry guys, I hope there aren't too many tears out there,

John K

Australia.

 

[Tidak Ada]

Don't forget, the mayor part of tubes is...silicon oxide !

 

eric

---

From: neoni...@googlegroups.com [mailto:neoni...@googlegroups.com] On Behalf Of JohnK
Sent: dinsdag 29 april 2014 9:40
To: neoni...@googlegroups.com; tubecollecto...@yahoogroups.com
Subject: [neonixie-l] News Flash - Do you collect tubes or semiconductors?

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[greg...@hotmail.com]

No worries....your tubes are 100% safe.

Even though some materials used in a vacuum tube might be classified as semiconductors, they dont operate in that manner.

Tubes conduct electrons through a vacuum or gas; solid-state devices (aka semiconductors) conduct thru, guess what, solids.

But, I do wonder how the density of atoms in a typical vacuum tube compares to the density of impurities in a doped semiconductor.

[Charles MacDonald]

On 14-05-02 01:48 AM, greg...@hotmail.com wrote:
> No worries....your tubes are 100% safe.
> Even though some materials used in a vacuum tube might be classified as
> semiconductors, they dont operate in that manner.

Actually looking at the old radios in my cupboard, I decided to buy a
few old style (germanium) transistors just to be on the safe side.

--
Charles MacDonald Stittsville Ontario
cm...@zeusprune.ca Just Beyond the Fringe
http://Charles.MacDonald.org/tubes
No Microsoft Products were used in sending this e-mail.